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Variable air volume boxes are frequently used within new acute care hospital design of heating, ventilation and air conditioning systems in Canada. Spatial and room-use noise limits as defined within the project requirements PM1 are often necessarily onerous to provide acoustical conditions that promote well-being and patient recovery, with appropriate noise control design crucial to the success of meeting the project requirements. Additionally, the desire for fiber-free linings to ductwork exacerbates the noise control limitations. This paper will review the available noise control strategies, the acoustic performance of fiber-free variable air volume box types with and without an attenuator and identify cost-benefits to the Design-Builder. This study will demonstrate how the implementation of a variety of variable air volume box models, sizes, operating conditions, pressure drops are affecting the noise performance. This study will summarize the appropriate variable air volume box types and design conditions that meet the project noise limits used in Canadian healthcare standards such as CSA Z8000, LEED and other provincial technical guidelines.
Jessica Carolina (Fri,) studied this question.